|Publication number||US7014726 B2|
|Application number||US 10/733,555|
|Publication date||Mar 21, 2006|
|Filing date||Dec 10, 2003|
|Priority date||Dec 10, 2002|
|Also published as||CA2509350A1, CN1741861A, EP1572380A1, EP1572380A4, US20040121089, WO2004052561A1|
|Publication number||10733555, 733555, US 7014726 B2, US 7014726B2, US-B2-7014726, US7014726 B2, US7014726B2|
|Inventors||Richard J. Whiting|
|Original Assignee||Smartslate, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (71), Non-Patent Citations (7), Referenced by (4), Classifications (40), Legal Events (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Pursuant to 35 U.S.C. § 119 (e), this application claims priority from, and hereby incorporates by reference for all purposes, U.S. Provisional Patent Application Ser. No. 60/432,607, entitled Rock Laminate, naming Richard J. Whiting as inventor, filed Dec. 10, 2002.
This invention relates in general to the field of building materials, and more particularly to a rock laminate and method for making the same.
Natural rock or stone is a desired building material because of its beauty and durability. Unfortunately, natural rock and stone suffers from several disadvantages such as cost, weight, flexibility, and ease of installation. For example, the weight of natural rock or stone results in increased shipping and handling costs and also increased installation costs. Installation costs are increased, among other reasons, because of the need to build support structures capable of handling the heavy weight of natural rock or stone building materials. Additionally, care must be taken to avoid or minimize breakage that can occur with the rock or stone in transport. This results in increased shipping costs. Furthermore, certain applications require flexible building materials, which eliminates the use of natural rock or stone because of their rigidity.
Attempts to solve the disadvantages inherent in the use of natural rock or stone as a building material have primarily focused on the development and use of synthetic or man-made products to simulate the beauty of natural rock and stone. Unfortunately, such products cannot match the beauty of nature in texture, color and look, and often fail to have the durability of natural rock. Other attempts have focused on cutting or slicing natural rock or stone into layers, such as quarter-inch thick layers, using various processes, such as wet saws. These techniques still suffer from the disadvantages of high material and production cost, relatively heavy weight, and inflexibility.
From the foregoing it may be appreciated that a need has arisen for a rock laminate and method for making the same. In accordance with the present invention, a rock laminate and corresponding methods are provided that substantially eliminate one or more of the disadvantages and problems outlined above.
According to an aspect of the present invention, a method for making a rock laminate is provided that includes providing a rock having an exposed surface, applying a polymer to at least a portion of the exposed surface of the rock such that a portion of the exposed surface is bonded to the polymer, and lifting a portion of the polymer, along with the corresponding bonded portion of the exposed surface, away from the rock to produce the rock laminate and to expose a new surface of the rock. A rock laminate made according to the method discussed above may be considered an aspect of this invention.
Other aspects of the present invention may include a flexible rock laminate. In such a case, further aspects may include rolling the rock laminate away from the rock to expose a new surface; flexing the rock laminate until a desired shape is acquired; molding the rock laminate around an object; and heating the rock laminate until the rock laminate exhibits a desired flexibility.
Yet other aspects of the invention may include curing the polymer after application of the polymer to the exposed surface of the rock; applying an additive to the polymer; applying a sealer to the rock side of the rock laminate; and the rock is provided as, for example, shale, limestone, sandstone, mudstone, slate, quartzite, phyllite, mica schist, chlorite schist, gneiss, talc schist, glaucophane schist, prasinite, epidote amphibolite, amphibolite, embrechite, agmatite, calc schist and mylonite.
Other aspects of the present invention may include a rock laminate that includes a layer of rock and a flexible layer. The layer of rock has a surface and plurality of pores defined by small openings in the surface of the layer of rock, the plurality of pores operable to receive a fluid. The flexible layer is positioned above at least a portion of the exposed surface of the layer of the rock and in at least a portion of the plurality of pores of the layer of rock. The portion of the flexible layer positioned in at least a portion of the plurality of pores of the layer of rock is received by the plurality of pores as a fluid and then becomes substantially a solid. In such an aspect, further aspects can include the layer of rock having a thickness of 2 mm or less, the flexible layer including an additive, the flexible layer being made of an organic polymer, and a rock side of the rock laminate including a sealant.
The various embodiments and implementations of the present invention provide a profusion of potential technical advantages and benefits. A technical advantage of the present invention may include the capability to inexpensively, especially when compared to conventional techniques, manufacture thin rock laminates that contain a layer of natural stone that provides the beauty and surface durability characteristics of the natural stone, without the corresponding weight and cost. This results in reduced installation costs, shipping costs, and material cost, while providing the same beauty of natural stone for use as a building material.
Another technical advantage of the present invention may include the capability to transform one slab of metamorphic rock, such as slate, into numerous rock laminates, thus conserving limited natural resources while enjoying the benefits and beauty of such natural rock many times more than what would be provided by one such slab of natural rock.
Yet another potential benefit of the present invention may include, in certain embodiments, the capability to make flexible rock laminates that may be used in virtually any application, such as in simulated solid rock columns, simulated solid rock tables, and to cover furniture, and various other items.
Still yet another technical advantage of the present invention may include the capability to use such rock laminates, either alone or in combination with other materials, in any of a variety of building material applications. For example, the rock laminates of the present invention may be used as roof shingles, countertop laminates, floor tile, wall coverings, column coverings, and the like.
Other technical advantages are readily apparent to one skilled in the art from the following figures, description, and appendices.
For a more complete understanding of the present invention and the advantages thereof, reference is now made to the following brief description, taken in connection with the accompanying drawings and detailed description, wherein like reference numerals represent like parts, in which:
Virtually all rocks may be generally classified or fit into one of three main groups that include igneous, metamorphic and sedimentary. These groups are defined according to the believed origins of the rocks. Igneous rocks are thought to be formed from molten rock, whether on the surface or below the surface. Sedimentary rocks are created from sediment, which is the particles of other older rocks, and are formed from the accumulation of eroded materials at the earth's surface. Metamorphic rocks are of either igneous or sedimentary origins and have been altered due to heat and/or pressure, with potential help from chemically active fluids. Metamorphic rocks are believed to have formed below the surface of the earth because of the intense heat and pressure that is present at such depths. Although the present invention is not limited to any one of these three main groups, the preferred rocks or stones are metamorphic and sedimentary rocks that have directional fabric or structure that is capable of releasing the rock or stone's stratum. Such a directional fabric or structure is believed to give the rock a foliation, allowing individual rock layers to be released more easily. Rocks having such a preferred directional fabric or structure can be found in various parts of the world, including regions of India, Brazil, South Africa, the United States, France and England. The use of the term rock herein shall be understood to also include the term stone.
It should be understood at the outset that although an exemplary implementation of the present invention is illustrated below, the present invention may be implemented using any number of techniques, whether currently known or in existence. The present invention should in no way be limited to the exemplary implementations, drawings, and techniques illustrated below, including the exemplary design and implementations illustrated and described herein. Additionally, the drawings contained herein are not drawn to scale; and, in some instances have been skewed for ease of illustration.
The slate pieces 100 of
While the slate pieces are shown aligned end to end in
In a preferred aspect of the invention, the exposed surfaces 110 of the slate pieces 100 are first cleaned of debris, chips, and foreign material prior to applying an a polymer. Other undesirable items that may be removed, include, but are not limited to, sharp edges, tooling marks, and hard crystal deposits (e.g., garnets or unwanted igneous rock embedded within the working stone).
Various cleaning and removal techniques can be utilized including, but not limited to vacuums, forced air, brushes, chemical cleaners, hand or machine chisels, sanding, grinding, sandblasting, steam cleaning, and cryocleaning (e.g., with dry ice). Other cleaning methods should become apparent to one of ordinary skill in the art. While such cleaning is preferred, it is to be understood that other aspects of the invention may not utilize cleaning.
In some implementations of the invention, a mold, such as an injection molding, can be provided above the exposed surface 110 of the slate piece 100 to outline a defined area, shape or dimension, so that a desired polymer pattern, shape or dimension can be created. Details of such an implementation are described below with reference to
The preferred polymer 200 in this implementation of the invention is a polyurethane; however, other materials now known or later developed can be used as will become apparent to one of ordinary skill in the art—e.g., resins, polyurea, organic materials and the like. The application of the polymer 200 to the exposed surfaces 110 can be accomplished in any of a variety of manners including but not limited to spraying with a spray nozzle 150, brushing, pouring, and heat laminating—the techniques of exposing the surfaces, including any known enhancement processes known by one of ordinary skill in the art, e.g., pressure application enhancements. In applications with molds on top of the exposed surfaces 110, the polymer 200 can be poured within the mold. Upon being applied to the slate pieces 100, the polymer 200 penetrates at least a portion of the exposed surface 110 of the slate pieces 100. As an example, and intended for illustrative purposes only, in one implementation of the invention, the polymer 200 can extend into micropores of the exposed surfaces 110 of the slate pieces 100.
After the polymer 200 is applied to the slate pieces 100, the polymer 200 can be cured. To speed production time, the curing process, in one implementation of the invention, may be sped up using any known or available techniques such as, for example, thermal heating, catalysts, infrared radiation, electron beam accelerators, ultraviolet light sources or gamma ray process. Gamma radiation, using radioactive cobalt atoms, is preferred in one implementation of the invention when considerable depth of treatment is necessary. In yet other implementations of the invention, specifically designed formulations of polymers can be utilized to accelerate the curing process. While the speeding up of a curing process is described with regard to one implementation of the invention, other implementations of the invention may not utilize a sped-up curing technique or process; and, in some implementations of the invention, the process of curing may be slowed. For example, to temporarily slow curing prior to or during delamination (described with reference to
Before the polymer 200 is applied, or shortly thereafter, additives or fillers may be added to the polymer 200 to enhance characteristics of the polymer 200. For example, the polymer 200 may have additives, such as pigments, fire-retardants, fibers, fillers, recycled materials, compounds for chemical and UV resistance, and ion charged particles.
Other additive materials include chopped or woven fiberglass or other fabrics that can be applied during, before or after curing of the polymer 200. Polymers 200 can be clear, opaque, tinted, color contrasted or color matched to that of the stone or as desired. Due to the fact that the present invention, in one implementation, results in a thin stone or rock laminate, the stone itself may be clear or partially transparent so that the color of the polymer 200 can be see through the clear or transparent stone. Thus, the color of the polymer 200 may be fully or partially visible from the stone side of the rock laminate. In one embodiment, an opaque polymer backing may be desirable, such as for back lighted signs, stained glass windows, lamp shades, shutters, etc.
The polymer 200 provides added strength, potential flexibility and durability to the rock laminate 400. The cured delaminated polymer 200 adheres to and picks up the thin slate layer 300, which should provide a surface and natural texture similar to or nearly exactly like the previously exposed surface 110 of the slate piece 100 (
Only one slate piece 100 is shown in
The rock laminate 400 on the roller 50 shows in more detail the delamination of the thin slate layer 300 and revealing of a new surface 110A of the slate piece 100—alternatively viewed as a peeling of a layer from the slate piece 100. Additionally shown in more detail is the adherence of texture of the previously exposed surface 110 of slate piece 100 (FIG. 1)—now part of the thin slate layer 300—to the polymer 200.
Once again, only one slate piece 100 is shown in
With reference to
In one implementation of the invention, the rock laminate 400 can be further cured after the delaminating process. For example, sheets of rock laminate 400 can be hung on supports and dried either naturally or via application of thermal energy. In another implementation of the invention, once the rock laminate 400 is removed, a clear or transparent sealer, which is known in the art, is preferably applied to the rock side 410 of the rock laminate 400 to protect the surface of the rock side 410, depending on the planned use of the rock laminate 400. And, in some implementations of the invention, the sealant can help increase the bond between various layers or strata that may exist in the thin slate layer 300. The preferred method of applying the sealer is via use of a paint curtain or spray with a recovery tank—for excess sealer. An air knife can additionally be used to blow off excess sealer and assist drying.
If desired, a suitable adhesive could be applied to the polymer side 420 of the rock laminate 400 for attachment to any of a number of known objects or desired substrate materials.
In accordance with one implementation of the invention, further processing of the rock laminate 400 can occur. For example, products such as trim molding, planks, boards, rails, and the like, can be made by extruding or pulling the rock laminate 400 through a heated roller system. Additionally, substrate materials can be bonded to the backside of polymer side 420 (
According to another implementation of the invention, texture can be added to the polymer side 420 (
The rock laminate 400 of the present invention may be used in numerous applications. For example, the rock laminate 400 can be used as an interior wall covering for living rooms, dens, kitchens, bed rooms, and bathrooms. It may also be used as a roofing shingle, or to cover doors, exterior sidings, columns, pillars, foundation cladding, and trade show displays and virtually any appliance or fixture. It may be used as a flooring material, as crown and trim molding, to cover windows, decorative mirror and picture frames, etc.
The rock laminate 400 in certain implementations of the invention can be used as or with a mold, such as a precasting lining, for concrete columns, pillars, foundations, railings, and fence posts. In other embodiments, it may be used to cover cabinets, countertops, back splashes, furniture, and any number of home and office furnishings. Other uses of the rock laminate 400, such as a slate rock laminate, include as wallpaper, as appliance accents to cover stereo equipment, and as custom signs, such as with inlay letters and numbers. The rock laminate 400 may be further used for garden decorations, such as to cover bird houses, butterfly houses, bird baths, flower planters, benches, and for vehicle trim, such as for boats, RVs, custom cars, trucks, and planes.
Thus, it is apparent that there has been provided, in accordance with the present invention, a rock laminate, such as a rock laminate or slate laminate, and corresponding method to make such a rock laminate that satisfies one or more of the advantages set forth above. Although the preferred embodiment has been described in detail, it should be understood that various changes, substitutions, and alterations can be made herein without departing from the scope of the present invention, even if all of the advantages and benefits identified above are not present. For example, the various elements or components may be combined or integrated in another system or certain features may not be implemented. Also, the techniques, systems, sub-systems, layers, compositions and methods described and illustrated in the preferred embodiment as discrete or separate may be combined or integrated with other systems, techniques, or methods without departing from the scope of the present invention. For example, the sealant (applied to the rock side 410) and the polymer 200 may have additives, such as pigments and fillers, as well as coating auxiliaries, for example anti-settling agents, antifoams and/or wetting agents, flow agents, reactive diluents, plasticizers, catalysts, auxiliary solvents, thickeners and the like—including ground or powdered slate, calcium carbonate, and recycled polymers. In certain embodiments of the present invention, multiple layers may be used without departing from the present invention. Further, each such layer may be made of the same or different materials and still fall within the scope of the present invention. Other examples of changes, substitutions, and alterations are readily ascertainable by one skilled in the art and could be made without departing from the spirit and scope of the present invention.
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|U.S. Classification||156/230, 428/15, 156/247, 428/363, 428/403, 156/718|
|International Classification||B28D1/00, B44C1/10, B32B9/04, B28D1/32, B44F9/04, B32B27/06, E04F13/14, B44C5/00, B32B9/02, B32B5/00|
|Cooperative Classification||B44F9/04, B28D1/32, Y10T428/2911, B32B27/06, B32B9/04, F21V1/16, Y10T428/2991, B28D1/00, F21V1/26, Y10T156/1189, B44C1/10, B32B2037/243, B32B2038/0076, B32B9/02, B32B2318/04, B32B38/0004|
|European Classification||B28D1/32, B44F9/04, B44C1/10, B28D1/00, B32B9/04, B32B38/00A, B32B27/06, B32B9/02|
|Dec 10, 2003||AS||Assignment|
Owner name: HUNTON & WILLIAMS LLP, TEXAS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SMARTSLATE, INC.;REEL/FRAME:014798/0670
Effective date: 20031210
Owner name: SMARTSLATE, INC., TEXAS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WHITING, RICHARD J.;REEL/FRAME:014798/0741
Effective date: 20031210
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Year of fee payment: 4
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|Nov 1, 2013||REMI||Maintenance fee reminder mailed|
|Mar 21, 2014||LAPS||Lapse for failure to pay maintenance fees|
|May 13, 2014||FP||Expired due to failure to pay maintenance fee|
Effective date: 20140321